/Engine/Plugins/Online/OnlineFramework/Source/Party/Public/Party/PartyMember.h
typedef TMulticastDelegate_TwoParams< void, [PlatformDataUniqueIdArgType](API\Plugins\Party\Party\FPartyMemberRepData\PlatformDataUniqueIdArgType), [PlatformDataUniqueIdArgType](API\Plugins\Party\Party\FPartyMemberRepData\PlatformDataUniqueIdArgType) > FOnPlatformDataUniqueIdChangedDif